I want to desing 60 W off grid lighting for my garden in los angeles. and It is going to light all the night (11 hours) is my calculation true ?

Consumption = 60 Watt x 11 hours x 1.25 (safety factor) = 825 Watt.hours

I looked at the average solar radiation data from gaisma, average sun hour for los angeles is about 4,2 hours

Size of Panel =( 825 Watt.hours/ 4.2 hours) = 196,42 --> 200 Watt panel

all losses =0,85

Dept of Discharge = 0,5

3 days reserve

Size of the Battery= 825 Watt.hours / (0,85 x 0,5 x 12 Volt ) x 3 days = 485 AH Battery ---> 2 x 242 AH battery 12 Volt

Size of Controller = (200 Watts / 12V) X 1.2 (Safety factor) = 20 A solar controller

If I use 2 x 100 Watts solar panel for desinging 24 Volt system is it better ?

Thank you.

Consumption = 60 Watt x 11 hours x 1.25 (safety factor) = 825 Watt.hours

I looked at the average solar radiation data from gaisma, average sun hour for los angeles is about 4,2 hours

Size of Panel =( 825 Watt.hours/ 4.2 hours) = 196,42 --> 200 Watt panel

all losses =0,85

Dept of Discharge = 0,5

3 days reserve

Size of the Battery= 825 Watt.hours / (0,85 x 0,5 x 12 Volt ) x 3 days = 485 AH Battery ---> 2 x 242 AH battery 12 Volt

Size of Controller = (200 Watts / 12V) X 1.2 (Safety factor) = 20 A solar controller

If I use 2 x 100 Watts solar panel for desinging 24 Volt system is it better ?

Thank you.

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